Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/141078
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- Title
- Quantum measurement of coherent tunneling between quantum dots
- Related
- Physical review B. Condensed matter and materials physics, Vol. 63, Issue 23, Article 235308, (2001), p.235308-1-235308-12
- DOI
- 10.1103/PhysRevB.63.235308
- Publisher
- American Physical Society
- Date
- 2001
- Author/Creator
- Wiseman, H. M
- Author/Creator
- Utami, D. Wahyu
- Author/Creator
- Sun, He Bi
- Author/Creator
- Milburn, G. J
- Author/Creator
- Kane, B. E
- Author/Creator
- Dzurak, A
- Author/Creator
- Clark, R. G
- Description
- We describe the conditional and unconditional dynamics of two coupled quantum dots when one dot is subjected to a measurement of its occupation number by coupling it to a third readout dot via the Coulomb interaction. The readout dot is coupled to source and drain leads under weak bias, and a tunnel current flows through a single bound state when energetically allowed. The occupation of the quantum dot near the readout dot shifts the bound state of the readout dot from a low conducting state to a high conducting state. The measurement is made by continuously monitoring the tunnel current through the readout dot. We show that there is a difference between the time scale for the measurement-induced decoherence between the localized states of the dots, and the time scale on which the system becomes localized due to the measurement.
- Description
- 12 page(s)
- Resource Type
- journal article
- Organisation
- Macquarie University. Dept. of Physics and Astronomy
- Organisation
- Macquarie University. Research Office
- Identifier
- http://hdl.handle.net/1959.14/141078
- Identifier
- ISSN:0163-1829
- Identifier
- mq_res-20111019-10255
- Language
- eng
- Reviewed
